См. например E. E. Lawler III. Job Attitudes and Employee Motivation: Theory, Research, and Practice. Personnel Psychology 23 (1970). С. 223–237; Julian B. Rotter. Generalized Expectancies for Internal versus External Control of Reinforcement. Psychological Monographs: General and Applied (1966). С. 80; Michael L. Mallin, and Michael Mayo. Why Did I Lose? A Conservation of Resources View of Salesperson Failure Attributions. Journal of Personal Selling & Sales Management 26 (осень 2006). С. 345; J. K. Sager, H. D. Strutton, and D. A. Johnson. Core Self-Evaluations and Salespeople, Psychology & Marketing 23 (февраль 2006). С. 95.